The COVID-19 pandemic has had a profound impact on the mental health of the general population. However, little attention has been given to the mental health of a group considered an essential category, police officers and the members of the armed forces. This study examined the mental health of 204 members of the armed forces and the police department assigned to monitor the public roads to enforce the measures adopted by the Peruvian government. The instruments used in the study included the Fear of COVID-19 Scale (FCV-19S), and the Revised Mental Health Inventory-5. The results indicate that (during the last month), the majority of the participants felt nervous and edgy (81.8%), and hopeless or sad (68.2%). According to the participants, the feelings of hopelessness and discouragement were significantly affecting their ability to rebound (84.3%). Participants had mixed feelings in regards of the fear generated by COVID-19, 42.6% reported extreme anxiety or panic, 40.6% were uncomfortable to think about COVID-19, and 42.6% were afraid of losing their lives due to the illness. The fear of COVID-19 predicted 19.7% (Adjusted R2 = 0.197; F = 21.32; p = .000) of the participants’ mental health well-being. In summary, the results suggest the presence of important psychological stressors related to COVID-19 that could potentially led to the development of mental health disorders among the Peruvian police and armed forces.